Magmatic differentiation is a complex process whereby a single melt can produce a wide variety of different igneous rocks. Some degree of differentiation typically develops across space and time in exposed magma bodies (intrusive or extrusive).

A geological map provides a graphic representation of selected geological features within a desired surface topographic or subsurface area. The size and relative position of each feature on the map corresponds to its correct geographic situation according to an established scale and projection. When mapping out a region, standardized terms are employed to describe the spatial orientation (attitude) of planar and linear elements of folds, faults, and other geological structures (diagram):

├ . The strike of a plane is the compass direction of the line formed by the intersection of the horizontal plane with the inclined plane under consideration. So, strike marks the geographical direction perpendicular to dip. ├ Strike and dip are depicted on geological maps by a long line (strike) with a short perpendicular line (dip) and a number indicating the angle of dip (degrees).

In North Amercia, strike is often expressed as the angle E or W of true North (0º-90º). In the European system, compass directions are expressed as azimuths. The azimuth is measured clockwise along an horizontal plane from the true North direction to the strike line (0º-359º). N=0º, E=90º, S=180º, W=270º.

A strike tending 26º east of true north would be expressed as N26ºE in Canada and the US, and as 026º in the European system. Similarly 74º west of true north would be expressed as N74ºW in the North American system, and as (360-74=) 286º in the European system.

├ .. The dip of a plane is analogous to plunge, and is the angle in degrees measured from an horizontal plane down to the inclined plane under consideration. That is, dip is the angle between the inclined plane and the horizontal plane, and is measured along a vertical plane perpendicular to the strike line of the plane.

Strike and dip directions of a fold are always mutually perpendicular, though two planes could have the same numerical strike (direction) and dip (angle). That is, a plane inclined at 45º to the horizontal (dip) that is facing SSE (135º) could have a strike (direction) of 45º East (o45º).

Strike and dip are differentiated in North America by expressing the direction according to the geographic quadrant faced by the planes. By European convention, strike is expressed as a three digit azimuthal number, and dip as a two digit angular number. Thus, a plane striking 25º and dipping 45º toward the southwest would be noted: 025-45SW.

A mélange is a mappable-sized, breccia containing varied rocks jumbled together with little continuity of contacts. The diverse blocks within a mélange are supported and separated by a matrix of fine grained material (typically shale, slate, or serpentinite) with a tectonicfabric. Mélanges originate either as components of tectonicaccretionary prisms, as a result of gravitational submarine sliding (olistostromes), or through diapirism (diagram).

An olistostrome, or "gravitational mélange", is a mappable, chaotic sedimentary deposit composed of heterogeneous olistoliths (blocks) derived from submarine gravity siliding or slumping of unconsolidated sediments. Such slides may have traveled several dozen to several hundred kilometers, resulting in large, thick, heterogeneous stratiform units that accumulated somewhat chaotically from an active fault escarpment, in various tectonic settings.

Olistostromes may range from several meters up to several hundreds of meters thick, and component olistoliths (blocks)may have preserved their internal coherence to the extent that the original facies can still be established. Olistoliths are immersed in a fine-grained matrix (typically mudstone or serpentinite).

Olistostromes are mélanges formed by semi-fluid accumulation of submarine, gravitational flow. Slide masses composed of hard rocks plus semi-indurated and soft sediments fail when the softer and friable materials form a basal mobile phase. Such a slide may even have liquefied and progressively disintegrated during displacement. So, olistostromes are stratigraphic units with chaotic bedding or without true bedding, yet which are intercalated between normal sedimentary bedding sequences.

Mineral are naturally occuring homogeneous solids with definite chemical compositions and ordered atomic arrangements, and are either elements or chemical compounds that have been formed by geological processes.

The Waterpocket Fold in Capitol Reef National Park is a classical monocline that is almost 100-miles long (160 km). It is a huge regional fold with one very steep side in otherwise nearly horizontal layers.

During the Laramide Orogeny, between 50 and 70 Ma, the rock layers on the west side of the Waterpocket Fold were elevated more than 7000 feet (> 2000 m) higher than the layers on the east. The entire Colorado Plateau was subsequently uplifted again, and erosion has exposed this fold within the last 15 to 20 million years.